表达式12: "f" left parenthesis, "x" , right parenthesis equals "x" minus 22 left brace, 4 less than or equal to "x" less than or equal to 24 , right brace 有图表。 要进行音频跟踪，按“Alt 键 + T”。fx=x−224≤x≤24
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表达式13: "x" equals 24 left brace, 2 less than or equal to "y" less than or equal to 8 , right brace 有图表。 要进行音频跟踪，按“Alt 键 + T”。x=242≤y≤8
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表达式14: "f" left parenthesis, "x" , right parenthesis equals negative 1 "x" plus 32 left brace, 24 greater than or equal to "x" greater than or equal to 21 , right brace 有图表。 要进行音频跟踪，按“Alt 键 + T”。fx=−1x+3224≥x≥21
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表达式15: "x" equals 21 left brace, 11 less than or equal to "y" less than or equal to 20 , right brace 有图表。 要进行音频跟踪，按“Alt 键 + T”。x=2111≤y≤20
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表达式16: "f" left parenthesis, "x" , right parenthesis equals negative "x" plus 26 left brace, 18 less than or equal to "x" less than or equal to 22 , right brace 有图表。 要进行音频跟踪，按“Alt 键 + T”。fx=−x+2618≤x≤22
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表达式17: "y" equals 4 left brace, 22 less than or equal to "x" less than or equal to 26 , right brace 有图表。 要进行音频跟踪，按“Alt 键 + T”。y=422≤x≤26
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表达式18: "f" left parenthesis, "x" , right parenthesis equals "x" minus 22 left brace, 26 less than or equal to "x" less than or equal to 45 , right brace 有图表。 要进行音频跟踪，按“Alt 键 + T”。fx=x−2226≤x≤45
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表达式19: "f" left parenthesis, "x" , right parenthesis equals 1.5 StartAbsoluteValue, "x" minus 7 , EndAbsoluteValue minus 5 left brace, 3.7 less than or equal to "x" less than or equal to 10.3 , right brace 有图表。 要进行音频跟踪，按“Alt 键 + T”。fx=1.5x−7−53.7≤x≤10.3
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表达式20: "f" left parenthesis, "x" , right parenthesis equals negative "x" plus 13 left brace, 13 greater than or equal to "x" greater than or equal to 8 , right brace 有图表。 要进行音频跟踪，按“Alt 键 + T”。fx=−x+1313≥x≥8
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表达式21: "y" equals 5 left brace, 8 greater than or equal to "x" greater than or equal to 5 , right brace 有图表。 要进行音频跟踪，按“Alt 键 + T”。y=58≥x≥5
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表达式22: "f" left parenthesis, "x" , right parenthesis equals 2 "x" minus 5 left brace, 3 less than or equal to "x" less than or equal to 5 , right brace 有图表。 要进行音频跟踪，按“Alt 键 + T”。fx=2x−53≤x≤5
